Cleanup test expectations after r161658.

Deflaked a bunch of tests and one manual rebaseline.

R=kbr@chromium.org
TBR=kbr@chromium.org
BUG=316372, 316460

Review URL: https://codereview.chromium.org/69523002

git-svn-id: svn://svn.chromium.org/blink/trunk@161740 bbb929c8-8fbe-4397-9dbb-9b2b20218538